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Andreas A. Polycarpou
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Journal Articles

Exploring the Impact of HFO-1234YF Refrigerant on the Tribological Properties of Advanced Polymeric Coatings

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Ajinkya Raut, Ahmad Amiri, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. November 2024, 146(11): 111401.
Paper No: TRIB-24-1049
https://doi.org/10.1115/1.4065870
Published Online: July 30, 2024
View Articletitled, Exploring the Impact of HFO-1234YF Refrigerant on the Tribological Properties of Advanced Polymeric Coatings
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Topics: Coatings, Compressors, Refrigerants, Tribology, Wear, Friction, Lubrication, Disks, Fourier transform infrared spectroscopy
Proceedings Papers

Automated Evaluation of Written Assignments in Engineering Using Task-Independent Features and Rubric-Guided Features

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Wanyu Xu, Daniel A. McAdams, Andreas A. Polycarpou
Proc. ASME. IDETC-CIE2023, Volume 4: 20th International Conference on Design Education (DEC), V004T04A002, August 20–23, 2023
Publisher: American Society of Mechanical Engineers
Paper No: DETC2023-116913
https://doi.org/10.1115/DETC2023-116913
View Paper titled, Automated Evaluation of Written Assignments in Engineering Using Task-Independent Features and Rubric-Guided Features
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Topics: Design education, Feedback, Mechanical engineering, Students, Technical writing
Proceedings Papers

Short Paper: An Initial Investigation of the Correlations Between the Quality of Engineering Assignments and Task-Independent Features

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Wanyu Xu, Daniel A. McAdams, Andreas A. Polycarpou
Proc. ASME. IDETC-CIE2022, Volume 4: 19th International Conference on Design Education (DEC), V004T04A011, August 14–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: DETC2022-91031
https://doi.org/10.1115/DETC2022-91031
View Paper titled, Short Paper: An Initial Investigation of the Correlations Between the Quality of Engineering Assignments and Task-Independent Features
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Topics: Design, Design education, Errors, Machine learning, Mechanical engineering, Teaching
Proceedings Papers

Predicting Fly-Height Modulation and Contact Forces in Ultra-Low Flying Head-Disk Interfaces Using a Tri-State Switching Dynamic Contact Model

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Sung-Chang Lee, Andreas A. Polycarpou
Proc. ASME. TRIB2001, ASME 2001 Symposium on Nanotribology and Nanotechnology for 1Tbit/in2, 27-35, October 21–24, 2001
Publisher: American Society of Mechanical Engineers
Paper No: TRIB-NANO2001-104
https://doi.org/10.1115/TRIB-NANO2001-104
View Paper titled, Predicting Fly-Height Modulation and Contact Forces in Ultra-Low Flying Head-Disk Interfaces Using a Tri-State Switching Dynamic Contact Model
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Topics: Disks, Dynamics (Mechanics), Air bearings, Contact dynamics, Damage, Degrees of freedom, Design, Dynamic models, Excitation, Rotating disks
Journal Articles

Rough Surface Normal Nanocontact Stiffness: Experimental Measurements and Rough Surface Contact Model Predictions

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Jungkyu Lee, Ali Beheshti, Andreas A. Polycarpou
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research-Article
J. Appl. Mech. March 2017, 84(3): 031006.
Paper No: JAM-16-1568
https://doi.org/10.1115/1.4035524
Published Online: January 12, 2017
View Articletitled, Rough Surface Normal Nanocontact Stiffness: Experimental Measurements and Rough Surface Contact Model Predictions
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Topics: Stiffness, Surface roughness, Stress, Thin films, Deformation
Journal Articles

Wear Modeling of Nanometer Thick Protective Coatings

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Jungkyu Lee, Youfeng Zhang, Robert M. Crone, Narayanan Ramakrishnan, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. March 2017, 139(2): 021601.
Paper No: TRIB-15-1305
https://doi.org/10.1115/1.4033492
Published Online: August 11, 2016
View Articletitled, Wear Modeling of Nanometer Thick Protective Coatings
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Topics: Finite element analysis, Poles (Building), Wear, Disks
Journal Articles

Yield Maps for Single and Bilayer Thin Films Under Scratch

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Abhish Chatterjee, Ali Beheshti, Andreas A. Polycarpou, Pascal Bellon
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. July 2016, 138(3): 031402.
Paper No: TRIB-15-1194
https://doi.org/10.1115/1.4032519
Published Online: April 21, 2016
View Articletitled, Yield Maps for Single and Bilayer Thin Films Under Scratch
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Topics: Coatings, Film thickness, Friction, Pressure, Simulation, Stress, Thin films, Finite element analysis, Materials properties, Silicon
Journal Articles

Wear Mechanisms of Gray Cast Iron in the Presence of Environmentally Friendly Hydrofluoroolefin-Based Refrigerant and the Effect of Tribofilm Formation

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M. Wasim Akram, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. October 2015, 137(4): 041602.
Paper No: TRIB-14-1303
https://doi.org/10.1115/1.4030711
Published Online: October 1, 2015
View Articletitled, Wear Mechanisms of Gray Cast Iron in the Presence of Environmentally Friendly Hydrofluoroolefin-Based Refrigerant and the Effect of Tribofilm Formation
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Topics: Refrigerants, Tribological films, Wear, Tribology, Cast iron, Stress
eBook Chapter

Dynamic Friction Characterization and Modeling of Tripod Constant Velocity Joints

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Series: ASTM Manuals
Publisher: ASTM International
Published: 2012
https://doi.org/10.1520/MNL6220121210425
ISBN: 978-0-8031-7036-0
Open the PDF for Dynamic Friction Characterization and Modeling of Tripod Constant Velocity Joints in another window
Journal Articles

An Elastic-Plastic Spherical Contact Model Under Combined Normal and Tangential Loading

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Aizhong Wu, Xi Shi, Andreas A. Polycarpou
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Research Papers
J. Appl. Mech. September 2012, 79(5): 051001.
https://doi.org/10.1115/1.4006457
Published Online: June 21, 2012
View Articletitled, An Elastic-Plastic Spherical Contact Model Under Combined Normal and Tangential Loading
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Topics: Friction, Shear stress, Stress, Tangential loading, Displacement, Finite element model, Coulombs, Stiffness
Proceedings Papers

A Physics-Based Fretting Model With Friction and Integration to a Simple Dynamical System

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Melih Eriten, Andreas A. Polycarpou, Lawrence A. Bergman
Proc. ASME. IDETC-CIE2011, Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B, 1301-1307, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-48660
https://doi.org/10.1115/DETC2011-48660
View Paper titled, A Physics-Based Fretting Model With Friction and Integration to a Simple Dynamical System
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Topics: Dynamic systems, Friction, Physics, Modeling, Surface roughness, Dynamics (Mechanics), Engineering simulation, Materials properties, Micromechanics (Engineering), Simulation
Proceedings Papers

An Elastic-Plastic Spherical Contact Model Under Combined Normal and Tangential Loading

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Aizhong Wu, Xi Shi, Andreas A. Polycarpou
Proc. ASME. IJTC2011, ASME/STLE 2011 Joint Tribology Conference, 289-291, October 24–26, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2011-61126
https://doi.org/10.1115/IJTC2011-61126
View Paper titled, An Elastic-Plastic Spherical Contact Model Under Combined Normal and Tangential Loading
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Topics: Tangential loading, Friction, Coulombs, Displacement, Finite element model, Physics, Shear strength
Proceedings Papers

Molecularly Thin Lubricant Layer Contact Model Accounting for Interfacial Slip

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Antonis I. Vakis, Melih Eriten, Andreas A. Polycarpou
Proc. ASME. IJTC2010, STLE/ASME 2010 International Joint Tribology Conference, 397-399, October 17–20, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2010-41249
https://doi.org/10.1115/IJTC2010-41249
View Paper titled, Molecularly Thin Lubricant Layer Contact Model Accounting for Interfacial Slip
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Topics: Accounting, Lubricants, Shear rate, Chemistry, Disks, Molecular dynamics, Storage, Viscosity, Viscosity measurement
Proceedings Papers

Tribological Performance of Polymer-Based Coatings for Oil-Less Piston-Type Compressor Applications

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Seung Min Yeo, Emerson Escobar Nunez, Andreas A. Polycarpou
Proc. ASME. IJTC2010, STLE/ASME 2010 International Joint Tribology Conference, 65-67, October 17–20, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2010-41250
https://doi.org/10.1115/IJTC2010-41250
View Paper titled, Tribological Performance of Polymer-Based Coatings for Oil-Less Piston-Type Compressor Applications
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Topics: Coatings, Compressors, Pistons, Polymers, Tribology, Friction, Air conditioning, Carbon dioxide, Cast iron, Climate change
Journal Articles

Erratum: “Application of Elastic-Plastic Static Friction Models to Rough Surfaces With Asymmetric Asperity Distribution” [ Journal of Tribology, 2010, 132(3), p. 031602 ]

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Chul-Hee Lee, Melih Eriten, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Errata
J. Tribol. October 2010, 132(4): 047001.
https://doi.org/10.1115/1.4002486
Published Online: October 7, 2010
View Articletitled, Erratum: “Application of Elastic-Plastic Static Friction Models to Rough Surfaces With Asymmetric Asperity Distribution” [ Journal of Tribology, 2010, 132(3), p. 031602 ]
Open the PDF for Erratum: “Application of Elastic-Plastic Static Friction Models to Rough Surfaces With Asymmetric Asperity Distribution” [ Journal of Tribology, 2010, 132(3), p. 031602 ] in another window
Topics: Friction, Stiction, Surface roughness, Tribology
Journal Articles

Impact of a Fixed-Length Rigid Cylinder on an Elastic-Plastic Homogeneous Body

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Raja R. Katta, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 2010, 132(4): 041402.
https://doi.org/10.1115/1.4002331
Published Online: October 1, 2010
View Articletitled, Impact of a Fixed-Length Rigid Cylinder on an Elastic-Plastic Homogeneous Body
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Topics: Cylinders, Finite element analysis, Storage, Disks, Contact mechanics, Deformation, Stress
Journal Articles

Application of Elastic-Plastic Static Friction Models to Rough Surfaces With Asymmetric Asperity Distribution

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Chul-Hee Lee, Melih Eriten, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 2010, 132(3): 031602.
https://doi.org/10.1115/1.4001547
Published Online: June 15, 2010
View Articletitled, Application of Elastic-Plastic Static Friction Models to Rough Surfaces With Asymmetric Asperity Distribution
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Topics: Stiction, Surface roughness, Friction
Journal Articles

Assessment of Elliptical Conformal Hertz Analysis Applied to Constant Velocity Joints

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Chul-Hee Lee, Andreas A. Polycarpou
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. April 2010, 132(2): 024501.
https://doi.org/10.1115/1.4000735
Published Online: March 24, 2010
View Articletitled, Assessment of Elliptical Conformal Hertz Analysis Applied to Constant Velocity Joints
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Topics: Finite element analysis, Pressure, Rollers, Stress, Dimensions
Journal Articles

Experimental and FEA Scratch of Magnetic Storage Thin-Film Disks to Correlate Magnetic Signal Degradation With Permanent Deformation

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Raja R. Katta, Andreas A. Polycarpou, Sung-Chang Lee, Mike Suk
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 021902.
https://doi.org/10.1115/1.4000848
Published Online: March 11, 2010
View Articletitled, Experimental and FEA Scratch of Magnetic Storage Thin-Film Disks to Correlate Magnetic Signal Degradation With Permanent Deformation
Open the PDF for Experimental and FEA Scratch of Magnetic Storage Thin-Film Disks to Correlate Magnetic Signal Degradation With Permanent Deformation in another window
Topics: Deformation, Disks, Finite element analysis, Stress, Thin films, Storage
Proceedings Papers

Analysis of Topographical Changes and Adhesion Failures in Gold-to-Gold Metal RF MEMS Switches With Cycling

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Seung Min Yeo, Spyros I. Tseregounis, Andreas A. Polycarpou, Adam Fruehling, Dimitrios Peroulis
Proc. ASME. IJTC2009, ASME/STLE 2009 International Joint Tribology Conference, 13-15, October 19–21, 2009
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2009-15120
https://doi.org/10.1115/IJTC2009-15120
View Paper titled, Analysis of Topographical Changes and Adhesion Failures in Gold-to-Gold Metal RF MEMS Switches With Cycling
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Topics: Adhesion, Failure, Metals, Microelectromechanical systems, Switches, Cycles, Atomic force microscopy, Cantilevers, Optical microscopy, Reliability